Truck



June 27, 1933.

W. C. HEDGCOCK ET AL TRUCK m H CF 3 13.0- I 1 1 an .n m 1 4 army, /%...W Q1 jam 7 m 1 v n L 1 n u F W J a w 0, u m m m h u Ed NM. H.MWWL NM.

June 1933. w. c. HEDGCOCK ETAL 1,915,139

' TRUCK I Filed Aug. 27, 1931 5 Sheets-Sheet 2 June 27, 1933. w. c. HEDGCOCK ET AL 1,916,139

TRUCK Filed Aug. 27, 1931 a Sheets-Sheet fwezziof:

, William: COG/L,

larly pointed out in the specification, drawings and claimsappended hereto.

n the drawings, which illustrate embodiments of the device and wherein like reference characters are used to designate like parts- Figure 1 is a fragmentary btip-plan view of the truck construction em ying the mvention;

Figure 2 is a side elevation of the truck construction shown in Figure 1;

Figure 3 is a transverse fragmentary sectional elevation taken substantially on the transverse center line of the truck construcforms of the truck construction.

.Referring first of all more particularly to the truck constructions illustrated in Figp t1cally the same as obtained with the familiar ures 1 to 6 inclusive, the side frame 20 is preferably of truss construction including the tension member 22, the compression member 24 integrally connected by spaced column guides 26 forming an opening or window in said frame.- members converge adjacent their ends as at 28 and are provided with thejournal boxes" 30, shown as of the standard A. R. A. construction, though they may be of any preferable construction. 'The journal boxes have cooperative assemblies 32, which also may be of any preferable construction. Although no spring lank is shown connecting the side frames,

' 1t is ofcourse to be understood'that one may be used.

. The side frames between the column guides are provided with the spring seats 34 prefer- 42.0mm transom, said member including a rocker seat 44 and the bolster stop 46. The member 42 serves to connect the spaced members 48 forming the transom. The transom is" provided with column guide embracing members 50 having guidin cooperation with said column guides, and t e transom is extended outwardly and provided with the springseat 52 shown in a recess or hood, be-

' spring assemblies 56 are The tension and compression lateral motion,

relation with the wheel and axle tween .which seat and the seat 54 the coil rovided. The spring seat 54 is positioned y means of the guiding bolt assembly 58 extending through the spring seats 52 and 54, and the spring seat 54 is supported on the outer end of the semielliptic springs 40. Between the spaced members 48 the bolster 60 is disposed, the bolster having the center bearing 62 and the side bearings 64 and is provided with the rocker seats 66 between which seats and the seats 44 rockers 68 are provided for supporting the bolster on the transom. The rockers68 consist essentially of the arcuate portions 70 and 72 engaging the rocker seats 44 and 66, and are POSltiODGCT by means tongues 73 received in the slots 74, similar upstanding members 76 bein provided and received in the slots 78 in the iolster. 1

It will be seen that the axes of the rockers converge upwardly, and in the preferred construction the arcuate surfaces of the rocker'members 68 are portions of a cylinder having a common center for'the radii. The arcuate surfaces on the seats 44 and 66 are formed with a larger radius than the radius of the faces of the rockers. This arrangement'of the elements of the rocker'system ermits a restricted transverse motion pracinclined swing hanger arrangement now in use particularly on passenger car trucks. The inclination of the rocking surface axes provides the desired iresis'tance to too free but when considerable lateral forces are encountered this resistance is overcome, permitting lateral motion of the bolster with the transmission of forces to other parts ofthe truck within the limits of the stops 46.

When lateral motion takes place the end of the bolster toward the direction of motion rises, while the opposite end becomes lower, which has the effect of causin the lateral motion to follow a curved at and to tilt the car body. The upwar converging inclination of the axes of the rocking surfaces causes an end thrust on each rocker against thebolster, which thrusts balance each other in normalposition,but give some resistance to lateral motion. When lateral forces exceed the lateralresistance of the rockers lateral motion takes place, and the position of parts shown in Figure 6 is obtained. The resistance increases as the motion increases. In any osition there is a force tendin to spread the ower rocker seats due to the lownward divergence of the axes of contact of the rock ing' surfaces. This spreading force is resisted and the rocker seats maintained in proper relation to each other by their being tied together in the transom construction.

The parts of the truck constructions shown in Figures 7 and .8 correspond substantially of the depending members orfiled August 27, 1931, wherein 150 is mounted heiween she to that shown in Figure 3, so therefore like reference characters are used to designate like parts.

in Figure Y, however, senibly 156 is similar to Figure 1'? in apylication the coil spring asthal; illiistraied in Serial No. 559,61l,

the ,tapering coii spring isiornied from a her of tapering diameter. That is, the i331: before 8011- ing has a gradually increasing diameter from one end to she other, Wnen wound, into a swing having substaniiall uniform spacing between ihe coils soc a honored has spiing has the coils close successively under load. Thai, is, the coils, close progressively from the smell diemeiei' oi the has to the ieige diameter of she her. This provides e coil spring of variable stifiness having considerahle softness under lighi; loads, and considerelole siifiness and high capacity erodes heavy loads. @n ace-o oi iis varying seiifiness such spring does not build up synchsonous vihi'aiion to the exi'ene of the ordicoil r Wilihe noted ihafc the soil s owing esseln- 56 consists, she modification shown, i -e outer iii-paring coii spring 158 and e inner tapering coil spring 1339 ia-cing in she opposisze direeiion. Thea: is, "the large coiis of the coil spring 156 are disposed downwardly, While the large soils of the es- 160 ere d sposed upwardly, 1:; will appreciated, however, shat any coinhion of these s o'fings may he used the construction shown in i robber pads are used snbseentieily as indicated in application Serial No, 559,617, filed z 'iugiisi- 2?, 1931. More speciiioeily, o iuhher inemoe'ss i 52 18% engaging "the innezc end of iheleaf spring a and being sewn-ed eo the erensveise rocker snpgioi'hing member hand 38 is seated upon she rosin e 1 w a. m w A: ioooci pen loo-b81115 disposed e member 166 and :the nieinher the side isai'ne as by moons of the o The soil spring assembly 56 is monmeo ha "tween the caps his end 1%, cops heing provided with the rubber pods s mounted between the spring engeging ine her 182 and the transom sees 18%, the boltv 58 being provided for securing the together. Although a i diameter and constant oi-he" is is understood s" i 'ng or :2 spring ofvarieiol as SROWD in Figure Y may he he undeesiood nee ihe be used in any combination. is, see pad 138 me a us d eione o? W1 oeos or ooitohinsiions,

Another mooificaiion he had nsin e a '1 w i, i a vai'zaole silliness ooii xii i spring, we coli being harmed from has of nniionm diameter I l on; Wound e piioh i'uhhel s ifiermediaa'ze she ends of coils close progressivel from the smallest pitch to the greatest pitc This also provides a coil spring *of variable stiffness having considerable softness under light loads and considerable stifiness and high capacity under heavy loads. This also tends to avoid synchronous vibration. r

Of course it is to be understood that the rubber pads may be used in any combination in any of the onstructions shown, and time the term-rubber? is used to cover any substance having-cushioning" qualities such.- as rubber has. By the use of ruhher or resilient 1 pads the metallic vibrations coming through the truck structure are dampened out, thereby promoting easy riding as Weli as relieving the truck parts, car body and lading of the destruc-aive action which might be caused by minute vibrations. The rubber pads also serve to deaden she noise which would obhen wise he 'tiansiniiied through the metallic parts.

is also 350 he understood that any spring arran ement such as shown in application Serial No. 552,153, filed July 21, 1931, may he used, and that we do not wish to he li niied hy the exact emhodimenis of the device shown, which are merely by Way of illusi mtion and not limitation, as various and ofihei forms of the device Wili of course he apparent to those skilled in the art Without defrom the spirit of the invention or she scope of the claims,

is claimed is- 1. in s car truck, the combinav'qion of 2 side frame, a teansom, e holster having senior side hearings supported on'seid transom, leaf spring interposed hehween said side frame and side frame oi; a point intermediate die ends of said spring, and resilient means iniei'posed between a portion of said transom and leaf spring, a

2. in s car truck, the (iol'i'lillllfl'ilfifl of o side "frame, e transom, a holster having hoving censor and side hearings and moon's 1 ed for iaiei'al motionv on said transom. in a cor leach, :Zihe coinhinaiion frame, transom, n leaf spring intern he'lwe'en said side iranie and eeansore sopponbed onsai-d side frame in; e poise ssid spei g,

side frame and trons-om ESQ spring partially supportings said transom on said leaf spring, and a ho ter mounted for lateral motion on said transom.

5. In a car truck, the combination of a side frame, a transom, a leaf spring interposed between said side frame and transom,

and a coil spring operatively connected to said transom and leaf spring outwardly of said side frame.

6. In a car truck, the combination of a side frame, a transom, a leaf spring interposed between said side frame and transom, a coil spring operatively connected to said transom and leaf spring outwardly of said side frame, and a bolster mounted for lateral movement adjacent said transom.

7. In a car. truck, the combination of a side frame, a transom, a bolster having center and side bearings supported on said transom, a leaf spring interposed between said side frame and transom and in supporting relation to said transom at a plurality of points, and resilient means interposed between a portion of said transom and leaf spring.

8. In a car truck, the combination of a side frame, a transom, a bolster having center and side bearings supported on said trausom, a leaf spring interposed between said side frame and transom and supporting said transom at a plurality of points, and resilient means interposed between one of said points of support of the leaf spring and said transom.

9. In a car truck, the combination of a side frame, a transom, a bolster having center and side bearings supported on said transom, a leaf spring interposed between said side frame and transom and in supporting relation to said transom at a plurality of points, and a coil spring operatively connected to said transom and leaf spring.

10. In a car truck, he combination of a side frame, a transom, a leaf spring interposed between at a plurality of points, resilient means inter osed between a dportion of said transom an leaf spring, an a bolster having center and side bearings and mounted for lateral movement adjacent said transom.

11. In a car truck, the combination of a side frame, a transom, a leaf spring interposed between said side frame and transom of points,

said side frame and transomand in supporting reletlon to sald transom frame, a leaf s and a. bolster having center and side bearings and mounted for lateral movement adjacent said transom.

13. In a car truck, the combination of a side frame, posed between said side frame and transom and supporting said transom at a plurality one of said points being outwardly of the side frame, and resilient means interposed between one of said points of support of the leaf spring and said transom.

14. In'a car truck, the combination of a side frame, posed between said side frame and transom and supporting said transom at a plurality of points, one of said points being outwardly of the side frame, and resilient'means inter.- posed between said last named point of support between said leaf spring and transom.

15. In a car truck, the combination of a side frame, a transom, a leaf spring interposed between said side frame and transom and supporting said transom at a plurality of points, one of said points being outwardly of the side frame, res1lient means interposed between one of said points of support of the leaf spring and said transom, and a bolster mounted for lateral movement adjacent said transom.

16. in a car truck, the combination of a side frame, a. transom, a leaf spring interposed between said side frame andtransom and supporting said transom at a plurality of points, one of said points being outwardly of the side frame, resilient means interposer between said last named point of support between said leaf spring and transom, and a bolster mounted for lateral movement adjacent said transom.

1?. In a car truck, the combination of a side frame, a transom, said transom including spaced members and an integral connecting member disposed outwardly of said side frame, a seat member integrally connecting said spaced members inwardly .of said side ring supported on said side frame and having portions supportingly cooperating with said connecting member and said seat member, resilient means interposed between said leaf spring and one of said last named members, and a bolster disposed between said spaced members and supported by said seat member.

18. In a car truck, the co side frame, a transom, said transom including spaced members and an integral connecting member disposed outwardly of said side frame, a seat member integrally onnecting said spaced members inwardly of said side frame, a leaf spring supported on said side frame and having portions supportingly cooperating with said connecting member and said seat member, resilient means interposed between said leaf spring and one of said last named members, a bolster disposed between a transom, a leaf spring inter-- a transom, a leaf spring inter-.

mbination of asprin said iction assembly, and a bolster mov ably mounted on said transom.

29. In a car truck, the combination of 1a side frame, a transom, said transom including spaced members and an integral connecting member disposed outwardly of said side frame, a seat member integrally connecting said spaced members inwardly of the side frame a friction assembly supported on said side frame and supportingly cooperating with said connecting member and said seat member, resilient means interposed between said friction assembly and one of said last named members, and a bolster supported on said seat member.

30. In a car truck, the combination of a side frame, a transom, said transom including spaced members and integral connecting members disposed outwardly and inwardly of said side frame, a friction assembly supported on said side frame and supportingly coo crating with said connecting members, resi ient means interposed between said friction assembly and one of said last named members, and a bolster having center and side bearings and so ported by said transom.

31. In a car trucfi, the combination of a side frame, a transom, said transom including spaced members and integral connecting members disposed outwardly and inwardly of said side frame, a friction assembly supported on said side frame and supportingly cooperating with said connecting members, a

coil spring interposed between said friction assembly and one of said last named members, and a bolster having center and side bearings and an ported by said transom.

32. i a car truck, the combination of a side frame and a transom, a spring supported at a single point by said side frame and providing spaced points of support for said transom, and a truck bolster having center and side bearings and supported by said transom.

33. In a car truck, the combination of a side frame, a transom, a bolster having center and side bearings supported on said transom, a leaf spring supporting said transom at a plurality of points, and a coil spring interbetween said transom and leaf sprin said leaf spring beingsupported on said si e frame at a single point.

:34. In a car truck, the combination of "a side frame, a transom, a bolster having center and side bearings supported on said transom, a leaf spring supporting said transom at a plurality of points, and a coil sprin inter-- posedbetween said'transom and lea. s ring at one of the points of support, sai leaf sprm being supported on said side frame at a sing e point.

35. In a truck, the combination of a side frame having spaced tension and compression members and connecting spaced column guides forming a transom opening, a transom partially supporting said transom on;

extending through said opening and slidably cooperating with said guides, a leaf spring supportin said transom at a plurality of points and carried by said tension member between said guides, and a coil spring disposed between said first named spring and transom.

36. In a transom, the combination of a body portion having means for supporting a bolster, said body portion and said means being provided with spring seats.

37. In a transom, the combination of a body portion having means adjacent the ends thereof for cooperative engagement with an associated side frame, means on said body portion for supporting an associated bolster, and pairs of spring seats spaced longitudinally of said transom, the seats of each pair being disposed on opposite sides of said first named means and spaced therefrom in a direction longitudinally of the transom.

38; In struck, the combination of spaced side frames, a transom disposed between said side frames and having cooperative engagement therewith for tying said side frames together, said transom mending spaced members extending outwardly of said side frames, rockerseats connecting said spaced members inwardly of said side frames, o bolster disused between said spaced members, rockers interposed between said rocker seats and said bolster for supporting said bolster for movement transversely of the truck, a spring seat associated with each of said rocker seats, a spring seat disposed on said transom outwardly of each of said side frames, and leaf spring supported on each of said side frames and supporting said transom the seats rovided thereon.

39. a truck, the'combination of spaced side frames, :2. transom disposed between said side frames and having cooperative engagement therewith for tying said side frames together, said transom including spaced mem-v hers extending outwardly of said side frames,

rocker seats connecting said spaced members inwardly of said side frames, a bolster disd between said spaced members, rockers interposed between said rocker seats and said bolster for supporting said bolster for movement transversely of the truck, a spring seat associated with each of said rocker seats, a spnn ward y of each of said side frames, and a leaf spring supported on each of said side frames and sup rting said transom 'at the seats pro vided t arson and a coil spring inter osed between one of said seats and each 0 said leaf sg 40. n a truck, the combination of spaced side frames, a transom disposed between said side frames, said transom including s aced members extending outwardlyiof sai side frames, rocker seats connect said'spaced members inwardly of said side rames, r501.

seat disposed on said transom outster disposed between said spaced members,

rockers interposed between said rocker seats and said bolster for supporting said bolster for movement transversely of the truck,a spring seat associated with each of said rocker seats, a spring seat disposed on said transom outwardly of each of said side frames, and a leaf spring supported on each of said side frames and supporting said transom at the seats provided thereon.

41. In a truck, the combination of spaced side frames, a transom disposed between said side frames, said transom including spaced members extending outwardly of said side frames, rocker seats, connecting said spaced members inwardly of said side frames, a bolster disposed between said spaced members, rockers interposed between saidrocker seats and said bolster for supporting said bolster for movement transversely of the truck, a spring seat associated with each of said rocker seats, a spring seat disposed on said transom outwardly of each of said side frames, and a leaf spring supported on each of said side frames and supporting said transom at the seats provided thereon and a coil sprin interposed between one of said seats an each of said leaf springs.

42. In a truck, the combination of spaced side frames including tensionand compression members and spaced columns integrally connecting said tension and compression members and forming a window therewith, a transom disposed between said side frames and having means slidably cooperating with said columns for tying said side frames together, said transom including spaced members extending through said window outwardly of said side frames, rocker seats connecting said spaced members inwardly of said side frames, a bolster disposed between said spaced members, rockers interposed be tween said rocker seats and said bolster for supporting said bolsterfor movement transversely of the truck, a spring seat associated with each of said rocker seats, a spring seat disposed on said transom outwardly of each of said side frames, and a leaf spring supported on each of said side frames in the windows thereof and supporting said transom at the seats provided thereon.

43. In a truck, the combination of spaced side framesincluding tension and compression members and spaced columns integrally connecting said tension and compression members and forming a window therewith, a transom disposed between said side frames and having means slidably cooperating with sad columns for tying saidside frames together, said transom including spaced members extend ng through said window outwardly of said side frames, rocker seats connecting said spaced members inwardly of saidside frames, a bolster disposed between said spaced members, rockers interposed between said rocker seats and said bolster for supporting said bolster for movement transversely of the truck, a spring seat associated with each of said rocker seats, a s ring seat disposed on said transom outward y of each of said side frames, and a leaf spring supported on each of said side frames in the windows thereof and supporting said transom at the seats provided thereon and a coil spring interposed between one of said seats and each of said leaf springs.

44. In a truck, the combination of spaced side frames, a transom disposed between said side frames and having cooperative engagement therewith for tying said side frames together, said transom. including spaced members, lateral motion means supported by sa d transom, acbolster having center and side bearings and disposed between said spaced members and supported by said lateral motion means for movement transversely of said truck, and a spring assembly interposed between said bolster and each side frame, said assembly including a semi-elliptic spring supported at a point intermediate its ends on said side frame.

45. In a truck, the combination of spaced s de frames, a transom disposed between said side frames and having -ooperative engagement therewith for tying said side frames together, said transom including spaced members, lateral motion'means supported by said transom, a bolster having center and side bearings and disposed between said spaced members and supported by said lateral motion means for movement transversely of said truck, and a spring assembly interposed between said bolster and each side frame, said assembly including a semi-elliptic spring and a coil spring,-said semi-elliptic spring being supported at a point intermediate itsends on said side frame.

46. In a truck, the combination of spaced s de frames, a transom disposed between said side frames and having cooperative engagement therewith for tying said side frames together, said transom including spaced members, lateral motion means supported by said transom, a bolster having center and side bearings and disposed between said spaced members and supported by said lateral motion means for movement transversely of said truck, and a spring assembly interposed between said bolster and each side frame, said assembly including a semi-elliptic spring and a co l spring supported on one end of said semi-elliptic spring.

Signed at Chicago, Illinois, this 18th day of August, 1931.

' WILLIAM C. HEDGCOCK.

ROBERT FL DARBY. 

